Table 3-6. ABS Troubleshooting and Testing (Cont)
INDICATOR LAMP DOES NOT TURN OFF WHEN VEHICLE SPEED EXCEEDS
4 MPH (6 KPH) OR INDICATOR LAMP TURNS ON WHILE DRIVING (CONT)
l Perform battery voltage check (page 3-100.6).
Ensure that parking brake is set.
If BATTERY VOLTAGE UNDER VOLTAGE is
displayed and Pro-Link indentifies that the battery IS
good, there is a problem with one of the four ABS
valve relays and/or the ABS valve relay wiring.
Either of these will affect both ABS valves on the
l Access Pm-Links Component
and ABS VALVES display.
l Exercise each ABS valve individually. If ABS
valve is working properly, it should be easily
l Buildup of air pressure to 60 psi (414 kPa) will
heard during exercising produre.
allow the mechanic to hear the ABS valves as
l Record whether or not ABS valves are work-
. Brake pedal should be pressed while exercising